Codacy style changes for test files

test/averageBy/averageBy.js

@@ -1,4 +1,5 @@
 const averageBy = (arr, fn) =>
-arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0) /
-arr.length;
+  arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0) /
+  arr.length;
+
 module.exports = averageBy;